Strength Degradation of a Tungsten Carbide-Cobalt Composite at Elevated Temperatures

The objective of this work was to investigate the transverse rupture strength behavior of tungsten carbide blended with 10wt% Co as a function of temperature. The samples were tested in three-point bending flexure in the temperature range 25–1000°C. Specimens were also indented at room temperature t...

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Bibliographic Details
Published in:Materials characterization 1999-07, Vol.43 (1), p.27-32
Main Authors: Acchar, W, Gomes, U.U, Kaysser, W.A, Goring, J
Format: Article
Language:English
Subjects:
Applied sciences
COBALT
COMPOSITE MATERIALS
Condensed matter: structure, mechanical and thermal properties
DEFECTS
Exact sciences and technology
Fatigue, brittleness, fracture, and cracks
FLEXURAL STRENGTH
FRACTURE PROPERTIES
HARDNESS
MATERIALS SCIENCE
Mechanical and acoustical properties of condensed matter
Mechanical properties of solids
Metals. Metallurgy
OXIDATION
Physics
TEMPERATURE DEPENDENCE
TUNGSTEN CARBIDES
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Summary:The objective of this work was to investigate the transverse rupture strength behavior of tungsten carbide blended with 10wt% Co as a function of temperature. The samples were tested in three-point bending flexure in the temperature range 25–1000°C. Specimens were also indented at room temperature to measure the crack size and the corresponding values of hardness and toughness. The results showed that the WC-Co composite suffered a strength loss at temperatures above 600°C. The fracture analysis indicated the presence of oxidation and microstructural defects in the samples tested at the higher temperatures.
ISSN:1044-5803
1873-4189
DOI:10.1016/S1044-5803(98)00056-4